When comparing Komodo Edit vs PhpStorm, the Slant community recommends Komodo Edit for most people. In the question“What are the best JavaScript IDEs or editors?”Komodo Edit is ranked 18th while PhpStorm is ranked 19th. The most important reason people chose Komodo Edit is:

Supports various PHP frameworks

Pro

PHPDoc support

Pro

Intelligent code completion

PhpStorm has two types of autocompletion: structural completion and word expansion.

Structural autocompletion makes predictions based on its understanding of PHP, while the latter tries to predict the word currently being typed based on previously typed words. Word expansion also works in comments and docstrings and it's similar to vim's omnicompletion.

Both types of autocompletion work extremely well, have little to no problems and are quite fast even when loading suggestions on the go.

Pro

Database view

The database tab, while not perfect, provides all the tools you need for daily usage. You always have your DB overview on the side (you can hide it when not needed).

Pro

Phar package recognition

Phar support allows running complete applications out of .phar files.

Pro

Inspections of all kinds

Not just for PHP, HTML and JavaScript, but especially good is SQL inspection and auto-completion of tables and fields. You can see at a glance, that your DB structure is in sync with your code.

Pro

External command support

Ability to setup custom external commands, which is something inherited from eclipse and found lacking on netbeans.

Pro

Auto-sync with remote folders

It allows monitoring code and sync the files that need to be changed with a remote server. This works more efficiently than libnotify and faster than vagrant auto rsync.

Pro

Built-in debugger

Has built in support for Xdebug including remote debugging.

Pro

Plugins allow futureproofing and customization

Active development work on plugins is always a plus, as it can extend the use of the IDE.

Pro

Has built-in console and SSH clients

This allows execution of needed commands without switching to other windows. It also keeps track of what's happening right in the IDE, which is especially good with Vagrant, because you can connect to a VM in a single click.

Pro

Integrated Vagrant support

It recognizes Vagrantfile and allows full control from the IDE.

Pro

Zero latency typing

Type codes with pleasure. Delay of visual feedback on a computer display has an important effect on typist's behavior and satisfaction, as cited here.

Pro

It comes with Testing RESTful Web Services

Save time of building your own or integrating libraries for testing RESTful Web Services. PHPStorm enables you to test endpoints without leaving your workspace or disrupting your workflow . You can code your endpoints in one window and test it immediately from another window.

Pro

Integrated Git GUI support

Allows users to manage their repositories directly from the IDE with a GUI which lets you do all Git commands.

Pro

Emmet integrated

Pro

Responsive core developers

Pro

Templating support

Supports Twig and Laravel's Blade (among others). Technically the later is part of a framework which Phpstorm supports but I've seen IDEs (e.g. Netbeans) with Laravel support but no blade support so it does deserve a notable mention.

Pro

Lots of plugins

Lots of plugins from JetBrains and the community are available, from useful things like support for Docker, Vagrant, Angular, Vue.js and more useless (but fun) like a nyan cat progress bar.

Cons

Con

Not very lightweight

Komodo Edit is not very lightweight and that can slow it down during startup.

Con

Adds project files to project code

Con

Resource exhaustive

It often maxes out even 4 cores, not to mention several hundred MBs of RSS with a single small project opened.

Con

Proprietary

It is not free software (free as in freedom).

Con

Pricey

Currently costs £78 but does not seem to offer much more than some free counterparts.

Con

Slow performance

A very slow indexing, many memory leaks, large projects after some time will be very slow, opening large files like 10mb can even break IDE.